Locking bolt unit for securing windows and doors



FIG. 1 is a left side elevational view of a locking bolt unit for securing windows and doors showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a front elevational view thereof; and

FIG. 7 is a top perspective view thereof. 

The ornamental design for a locking bolt unit for securing windows and doors, as shown. 